Separation Technology for Metals Recovery

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Purification Technology".

Deadline for manuscript submissions: closed (10 August 2024) | Viewed by 2048

Special Issue Editors


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Guest Editor
Łukasiewicz Research Network—Institute of Non-Ferrous Metals, 44-100 Gliwice, Poland
Interests: chemistry; ion exchange; solvent extraction; metallurgy; hydrometallurgy; recycling

E-Mail Website
Guest Editor
Łukasiewicz Research Network—Institute of Non-Ferrous Metals, 44-100 Gliwice, Poland
Interests: hydrometallurgy; recycling; environment protection techniques

Special Issue Information

Dear Colleagues, 

I would like to invite you to participate in the joint creation of this Special Issue of Separations, dedicated to the use of separation technology for metal recovery. 

In recent years, metal recovery has become more difficult, and the world is facing the challenge of a drastic decline in the quantity, quality and availability of primary, secondary and recycled raw materials. The scientific area considered for publication includes hydrometallurgy, pyrometallurgy, ore and secondary processing, analytical chemistry, materials engineering with various levels of technological readiness, i.e., cognitive, application and implementation research. Special attention will be given to hydrometallurgical technologies of raw material treatment.

Hydrometallurgy is a method in the field of metallurgy that allows for the recovery of metals and their separation in a simple and cheap manner, even from low-quality resources. The techniques involved, e.g., solvent extraction, ion exchange, electrochemistry and membrane techniques, allow for the selective and effective separation of metals. The advantage is high selectivity and purity of the obtained products, which could be dedicated to various areas of application, even demanding ones such as medicine, the defense industry, aviation or electromobility. Hydrometallurgical methods are used to produce many metals, mainly copper, nickel, cobalt, precious metals, rhenium, rare earth metals, etc. Many of them are defined as critical raw materials for the world. 

As such, this Special Issue is dedicated to separation technology for metal recovery, with a particular emphasis on the production of innovative materials using these methods and new analytical techniques. 

We look forward to receiving your contributions  

Dr. Katarzyna Leszczyńska-Sejda
Dr. Andrzej Chmielarz
Guest Editors

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Keywords

  • hydrometallurgy
  • analytical technology
  • solvent extraction
  • ion exchange
  • membrane techniques
  • electrochemistry
  • pyrometallurgy

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Published Papers (2 papers)

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Research

13 pages, 3593 KiB  
Article
Application of Electrodialysis to Production of High-Purity Perrhenic Acid
by Patrycja Kowalik, Dorota Kopyto, Grzegorz Benke, Mateusz Ciszewski, Alicja Grzybek, Joanna Malarz, Karolina Pianowska, Karolina Goc, Szymon Orda, Dorota Babilas, Piotr Dydo and Katarzyna Leszczyńska-Sejda
Separations 2024, 11(9), 253; https://doi.org/10.3390/separations11090253 - 23 Aug 2024
Viewed by 682
Abstract
Laboratory tests were conducted for the production of high-purity perrhenic acid using a membrane technique—electrodialysis. Four solutions were used in the tests: diluate, concentrate, anolyte, and catholyte. The experiments were carried out in a two-stream system. The influence of basic process parameters, including [...] Read more.
Laboratory tests were conducted for the production of high-purity perrhenic acid using a membrane technique—electrodialysis. Four solutions were used in the tests: diluate, concentrate, anolyte, and catholyte. The experiments were carried out in a two-stream system. The influence of basic process parameters, including the flow rate of process streams or current density, on the purity of the obtained perrhenic acid were examined. Electrodialysis was also carried out as part of this research, aiming to concentrate the perrhenic acid >100 g/dm3. The concentrate solution obtained in the concentration tests, with a concentration of 148.7 g/dm3 HReO4 and 530 mg/dm3 NH4+, was then sent to the purification process using the electrodialysis method. The purification process was carried out until the concentration of NH4+ ions was <100 mg/dm3 in the concentrate. Finally, perrhenic acid was obtained with the following composition: 169.7 g/dm3 HReO4 and 70 mg/dm3 NH4+. Based on this research, a technological scheme for producing high-purity HReO4 by electrodialysis was developed. Full article
(This article belongs to the Special Issue Separation Technology for Metals Recovery)
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12 pages, 2188 KiB  
Article
Technology for Aiding the Cyanide Leaching of Gold Ores
by Jiahong Han, Shujuan Dai, Jiushuai Deng, Shandong Que and Yugao Zhou
Separations 2024, 11(8), 228; https://doi.org/10.3390/separations11080228 - 26 Jul 2024
Viewed by 1090
Abstract
Cyanide leaching technology was studied for low-grade oxidized gold ores in Guangxi Province. The gold grade of the raw ores was 1.32 g/t. The gold leaching rate was 90.91% under the optimal conditions for the following conventional leaching process: using steel forging as [...] Read more.
Cyanide leaching technology was studied for low-grade oxidized gold ores in Guangxi Province. The gold grade of the raw ores was 1.32 g/t. The gold leaching rate was 90.91% under the optimal conditions for the following conventional leaching process: using steel forging as the grinding medium, a grinding fineness of −0.074 mm accounting for 92.53%, a stirring speed of 1500 r/min, a pulp leaching concentration of 28.57%, a pH value of 10.5, a temperature of 25 °C, a leaching time of 24 h, and a potassium cyanide consumption of 4 kg/t. A new type of mixed aid-leaching agent (0.6 kg/t) was used, with a dosage of potassium cyanide of 2 kg/t. All else being equal, the gold leaching rate increased by 2.17% to 93.20% after 18 h of aid leaching compared to that of conventional leaching for 28 h. Meanwhile, the amount of potassium cyanide used was reduced by 50%. The aid-leaching agents restored the surface activity of passivated gold particles and depressed the adsorption of gold and its complexes by gangue minerals. This approach could shorten the leaching time and increase the gold leaching rate. Full article
(This article belongs to the Special Issue Separation Technology for Metals Recovery)
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